EVS Tru-Motion 2.0: patented EVS Tru-Motion 2.0 hinge TM5+) enables the RS8 PRO to stay suspended on the leg in the intended position during the full range of motion with the natural roll and glide movement that mimics the natural arthokinematics of the knee. If a brace has migrated down the leg and the hinges are not aligned with the medial and lateral condyles of the knee - midline, hyperextension cannot be controlled effectively and injury can occur; the TM5+ hinges and RS8 PRO are designed to reduce the risk of that occurring.